function s1_hello(){
  echo "hello, world!"
}
function s2_tell_who_i_am(){
        echo $(whoami)
}
function s3_which_distro_do_i_use(){
        if [ -f /etc/os-release ]; then
                source /etc/os-release
                echo "$NAME"
        fi      }

function s4_view_my_cpu_arch(){
  uname -m #1
}
function s5_show_first_scsi_disk_size(){
  local size=$(blockdev --getsize64 /dev/sda)
  echo $((size / 1073741824)) 
}
function s6_show_main_memory_size_in_megabytes(){
  free -m | grep "Mem:" | awk '{print $2}'
}
~
